<!DOCTYPE html>
<html>
<head>
	<title></title>
</head>
<body>

<script type="text/javascript">

var str = '你好';

var arr = [1,2,3];
console.log( Array.isArray( arr ) );
console.log( arr instanceof Array );
console.log( Object.prototype.toString.call(arr).indexOf('Array') > -1 );
console.log(  Array.prototype.isPrototypeOf(arr) )
console.log(  arr.constructor.toString().indexOf('Array') > -1 )

</script>

</body>
</html>